Silex: URL Amigables

http://localhost:82/websilex/miweb/public/en-un-lugar-de-la-mancha-de-cuyo-nombre-no-quiero-acordarme
$app->get('/{urlAmigable}', function (Silex\Application $app, $urlAmigable)  {
    $sql = "select * from noticias where urlAmigable = '".$urlAmigable."'";
    $arrNot = $app['db']->fetchAll($sql, array());
    return $arrNot[0]["texto"];
});